package cn.rjtraining.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

public class CharacterEncodingFilter implements Filter {

	private String encoding;

	public void destroy() {

	}

	public void doFilter(ServletRequest arg0, ServletResponse arg1,
			FilterChain arg2) throws IOException, ServletException {
		if (encoding != null && "".equals(encoding)) {
			arg0.setCharacterEncoding(encoding);
			arg1.setCharacterEncoding(encoding);
		} else {
			arg0.setCharacterEncoding("UTF-8");
			arg1.setCharacterEncoding("UTF-8");
		}
		arg2.doFilter(arg0, arg1);
	}

	public void init(FilterConfig arg0) throws ServletException {
		encoding = arg0.getInitParameter("encoding");
	}

}
